Droplet-Wall/Film Impact in IC Engine Applications (ARO Topic 1.4.1 under ARO s Dr. Ralph A. Anthenien)
Abstract
The objective of the proposed study is to determine the fate of droplets impacting a surface under various ambient pressure and surface conditions, which plays a critical role in controlling the efficiency of applications such as those associated with spraying in internal combustion engines (ICEs). Fuels sprayed inside engines can impact with the internal surfaces and thus not only obviates the purpose of atomization, but the subsequent film gasification also represents a completely different mode of fuel gasification that could fundamentally affect the fuel/air mixing and combustion processes including soot formation. The proposed program investigates the dynamics of droplet impaction on dry or wetted, heated and unheated, surfaces of various natures in atmospheric as well as high-pressure environments simulating those within the ICEs. An existing apparatus will be upgraded to investigate the droplet-surface impact event at ambient and elevated pressures and various surface conditions. Specifically, the droplets will be generated by using a piezoelectric device with a variable needle diameter in order to achieve a wide range of droplet sizes, 100 to 2000µm in diameter. The generation of smaller droplets will also be explored. Droplet generators would be used along with a pressurized chamber, capable of pressures up to 20atm. Effects of temperature will be explored along with pressure. Diagnostics such as high speed color interferometry will be employed.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jan 12, 2017
- Source ID
- W911NF1610449
Entities
People
- Chung K. Law
Organizations
- Army Contracting Command
- Princeton University
- United States Army